74HC373集成電路（IC）的鎖存器規(guī)格書PDF中文資料

1. General description

The 74HC373; 74HCT373 is an octal D-type transparent latch with 3-state outputs. The device

features latch enable (LE) and output enable (OE) inputs. When LE is HIGH, data at the inputs

enter the latches. In this condition the latches are transparent, a latch output will change each time

its corresponding D-input changes. When LE is LOW the latches store the information that was

present at the inputs a set-up time preceding the HIGH-to-LOW transition of LE. A HIGH on OE

causes the outputs to assume a high-impedance OFF-state. Operation of the OE input does not

affect the state of the latches. Inputs include clamp diodes. This enables the use of current limiting

resistors to interface inputs to voltages in excess of VCC.

2. Features and benefits

? Wide supply voltage range from 2.0 V to 6.0 V

? CMOS low power dissipation

? High noise immunity

? Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

? Complies with JEDEC standards:

? JESD8C (2.7 V to 3.6 V)

? JESD7A (2.0 V to 6.0 V)

? Input levels:

? For 74HC373: CMOS level

? For 74HCT373: TTL level

? 3-state non-inverting outputs for bus oriented applications

? Common 3-state output enable input

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V

? Multiple package options

? Specified from -40 °C to +85 °C and from -40 °C to +125 °C